Shue, L., Dey, Subhrakanti, Anderson, B.D.O. and De Bruyne, Franky (1999) Remarks on filtering error due to quantisation of a 2-state hidden Markov model. In: Proceedings of the 38th IEEE Conference on Decision and Control. IEEE, pp. 4123-4124. ISBN 0780352505
Shue, L., Anderson, B.D.O. and Dey, Subhrakanti (1998) Exponential stability of filters and smoothers for hidden markov models. IEEE Transactions on Signal Processing, 46 (8). pp. 2180-2194. ISSN 1053-587X